Burglar-alarm.



G. O. RANLETT.

BURGLAR ALARM.

APPLICATION FILED JUNE 10, 1908.

956,41 4, Patented Apr. 26, 1910.

WITNESSES A INVENTOR gMM M f aXfahfij A ORN EY CHARLES c. RANL-ETT, onOAKLAND, CALIFORNIA.

BURGLAR-ALARM.

Specification of Letters Patent.

Patented Apr. 26, 1910.

Application filed June 10, 1908. Serial No. 437,742.

To all whom it may concern:

Be it known that I, CHARLES C. RANLETT, citizen of the United States,residing at Oakland, in the county of Alameda and State of California,have invented new and useful Improvements in Burglar-Alarms, of whichthe following is a specification.

- My invention relates to burglar alarm devices, and pertains especiallyto an attachment for a window, door or other closure to be opened; whichdevice will act when the door, window or other closure issurreptitiously moved, to explode a cap or the like, and so sound analarm.

The invention consists of the parts and the construction and combinationof parts as hereinafter more fully described. and claimed, havingreference to the accompanying drawings, in which Figure 1 shows theattachment of my device to a window. Fig. 2 is a perspective of thedevice.

A represents the body of the device, which may be of any suitable size,shape or material. This device, as here shown, is in the form of acasting adapted to be attached to a window, as represented at 2.

3 is a spring secured to the casting and carrying the hammer 4 which ismovable toward and from an anvil portion 5, which latter is suitablyfashioned to support an explosive cap, so that when the spring 3 isdrawn downward or away from the anvil, with the hammer in line with thecap, the cap will be exploded on releasing the tension on the spring.

As here shown, the cap is designed to be supported in the guides 6 justbeneath the anvil, and the hammer is movable toward and from the anvilbetween these guides.

The hammer end of the spring projects into the path of a fixed stop 7 onthe window casing; this stop being arranged proximate to the spring andslightly above the latter when the window is closed. The sprin ispivoted at one end, as shown at 9, so t at it could be swung in or outbeneath the stop, to permit the wlndow to be opened at any time withoutexploding the cap or snapping the spring.

In operation, the casting being suitably attached to the window, and thestop 7 being suitably fixed on the casing, and the window closed, thedevice is loaded by simply pulling down on the spring or movin itoutward so as to let the cap be inserted in the guides 6, and the springis turned back to bring the hammer underneath the anvil, and with theend of the spring under-' neath the stop 7 If the window should beopened, the stop will intercept the spring enough to bend the springuntil its end can ride over the stop, whereupon the hammer will impingeupon the cap and against the anvil, efiecting an explosion or detonationwhich will have the effect on the intruder of being fired at.

Having thus described my invention, what I claim and desire to secure byLetters Patent is An improved burglar alarm comprising two co-aetinmembers, one of said members adapted to be fitted to a window or likepart, said member having one end enlarged and offset and provided withan internal chamber beneath its upper portion and the lower wall of saidchamber being slotted and said slot being of less width than the widthof the chamber to provide spaced guides adapted to support the flange ofa percussion-cap; the other member of said device consisting of a partformed of spring metal having one end pivoted to the firstnamed memberso that the second member may swing in a plane transverse to the firstmember, said second member having a hammer on its free portion adaptedto be moved into and out of register with the chamber of the othermember and to operate through the slot in the bottom of said chamber,and explode the cap supported upon said guides; and a fixed stop on thewindow casing to engage said spring member to hold the hammer out ofengagement with the cap, and to release said member to allow the hammerto explode the cap when the window or like part is moved relatively tothe part carrying the stop.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

CHARLES C. RANLETT.

Witnesses:

F. B. HoUcH, L. HARDER.

